i stood there patiently until he _____ his work答案为什么是had finished.为什么用过去完成时能直接用过去时吧。这两个动作谁先谁后呀。

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istoodtherepatientlyuntilhe_____hiswork答案为什么是hadfinished.为什么用过去完成时能直接用过去时吧。这两个动作谁先谁后呀。istoodtherepat

i stood there patiently until he _____ his work答案为什么是had finished.为什么用过去完成时能直接用过去时吧。这两个动作谁先谁后呀。
i stood there patiently until he _____ his work
答案为什么是had finished.为什么用过去完成时
能直接用过去时吧。这两个动作谁先谁后呀。

i stood there patiently until he _____ his work答案为什么是had finished.为什么用过去完成时能直接用过去时吧。这两个动作谁先谁后呀。
除非有上下文,要不然had finished 和finished 语法上都没问题
这两个动作谁先谁后呀.
你这问题问的好
用he had finished 就有他做完了,你还stood there 的含义,就是说,他先“做完”
直接用finished就没有这时间的差别的含义,可以是同时完成的意思

因为finish是在stood这个动作完成前完成这个动作的。had finished是过去完成时。过去完成时就是在过去某个动作之前完成一个动作。

用完成时较好

直到他已经结束工作，是完成时态，因为描述的是过去的事，所以用过去完成时，had+动词过去分词

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